Pittsburgh defensive tackle Aaron Donald

Andrew Weber / USA Today Sports

Aaron Donald is one of the most athletic players in the 2014 NFL draft because of the 4.68 40-time, and 35 reps of 225 pounds he posted at the NFL combine. But the fact he's only 6-foot-1, 285 pounds has many concerned he's too small to become a dominant pass rusher, and effective run stopper in the NFL like he was at the University of Pittsburgh. Donald would likely compete with Randy Starks, Jared Odrick and Earl Mitchell for playing time in the D-line rotation.

Aaron Donald is one of the most athletic players in the 2014 NFL draft because of the 4.68 40-time, and 35 reps of 225 pounds he posted at the NFL combine. But the fact he's only 6-foot-1, 285 pounds has many concerned he's too small to become a dominant pass rusher, and effective run stopper in the NFL like he was at the University of Pittsburgh. Donald would likely compete with Randy Starks, Jared Odrick and Earl Mitchell for playing time in the D-line rotation.